<!DOCTYPE html>
<html>
<head>
<title>CSS 2.1 Test Suite: Test for z-ordering of inline-block</title>
<link rel="author" title="L. David Baron" href="https://dbaron.org/" />
<link rel="author" title="Mozilla Corporation" href="http://mozilla.com/" />
<link rel="help" href="http://www.w3.org/TR/CSS21/zindex.html#painting-order" />
<style type="text/css">
div#test > span { display:inline-block; vertical-align: top; }
div#test > span > span { display: block; background: green; color: green; border-bottom: 0.25em solid green; border-top: 0.25em solid green; }
div#before { height: 1em; margin-bottom:-1em; }
div#before > span { display: inline; vertical-align: top; background: red; color: red; }
</style>
</head>
<body>
<div id="before"><span>&nbsp;x&nbsp;</span></div>
<div id="test"><span><span>&nbsp;x&nbsp;</span></span></div>
</body>
</html>
